Coupling connection for pipe joints and method of making same



Sept. 27, 1938; A. H. GOEPEL ET 'AL 2,131,509 COUPLING CONNECTION FOR PIPE JOINTS AND METHOD or MAKING [SAME l Filed April 22, 1937 a pa m k NT! Eu M ma Y B 4%. .3 2 0. 1 III i 3 a 2 4 1 d l m a. l .p-

..Patentecl Sept. 27, 1938 COUPLING coNNEoTIoN AND-METHOD'OF when. Goepel and adar month-e,

waterbury,-Conn.

I Applicatlon' April 22;Maser-m1Nausea .qolaifmjs. (or; 294157) This invention relates to pipe couplings, and particularly to the'pa'cking element employed in couplings'to connect the various types of joints for use with drain, vent, and other connections.

- 5 This invention is an improvement over the sub ject matter disclosed in Patent No.2}03'7,625,is'- sued to thesame inventors, April 14, 1936.

The essential feature of the present develop ment resides in the improved construction for permanentlmassembling a sealing washeror gasket to theend of a pipe at a connecting joint, the connection of the washerto the' joint end of the pipe being completed in whole or in part' iata the place of manufacture of the pipe.

A further feature is the particular method employed in assembling the-washer to the pipe end, and staking the same in position against rotation relative to the'en'dof a pipe connection."The

method of assembly'resides particularly in the feature of havingone of the'pipe' joint'ends out- :wardly flared initially constructing the inside diameter of thewasher, permitting its assembly over the flared end, and subsequently forcing and compressing'the washer by a swaging operation untilit closes snugly underneath the flared end of said pipe. This me'thodofassembly not only results in a more economical cost of construction, but also' conducesto produce a better see]- ing element at the'pipe-joint, as will hereinafter be more fully pointed out.

With these and other objects in view, there have been illustrated on theaccompanying drawing two forms in which the invention may be conveniently embodied in practice. f

In the drawing:

Fig. 1 represents a .vertical; sectional view 1' through the union connection between two pipe ends, embodying the principles of the invention.

a Fig. 2 is a fragmentary sectional view of one of the pipe ends,.showing therelative construction and size of. the soft metal sealingwasher,;

with respect-to the'pipe-end in position to b e assembled thereupon. a v Fig. 3is a similar view showing the washer in its completed assembled position'in association withtheltools for producing fihatopefa'tion.

I Fig. 4 is a top-plan view= of'the same with tools removed;

, Q r Fig. 5 is a fragmentary nlarg'ed view'o f one 6 section of the end of the pipe showing the washer' in position ready for the forming operation.

"Fig, 5A is a similar view to'FigJ5 after the forming operation showing the particular type of I staking lug used in the construction. 55

' initiallycastiasin Fig. 2,

parts existing before the 'iinal assembly tion being clearly "shown if in the enlarged "View;

Fig. '6 is a vertical sectional view of the pipe FOR PIPE JOINTS MAKING SAME.

connection, s owing a modified embodiment, of the invention. 1. 1

Referringnow to the drawing-in whichlike a numerals ideno'te corresponding parts throughout:

the several views, the'num'eral' ill-indicates "one of the pipe ends, such as a J-bend,' asis used in lavatory or sink-connections,"andthe name-r t ll indicates the other pipe,-suc'h ais a-wall pi' whichthe connection is --made.

The upper-end of the'pipe end- IB is formed 'o with an annular I bead-or" flange 12-" preferably formed outwardly from the metal swell 'ofsaid pipe, *a short distance belovirt'he end thereof; thus leaving'a cylindrical neck 13 terminatin'gthe end of the tube. The flange" l2 and neck "ll'serve 15 as a supporting" means for a'soft r'netalring or sealing washer l4 preferably *of lead, which 'is' adapted to be assembled permanently at 'the' source -:of manufacture 'in a" manner herewith, described, we. j 'j a As bestshownin Fig.2, the cylindrical neck" i3 is flared slightly outwardly, and' whentaken-in- 1 conjunction with the-flange l2,* defln'es' an acute angular. circumferential recess l3 a" thereabout." The sealinggwas'her l4 isinitially cast? to the de-' 5 sign as-shown in :Fig. .2, wherein the diameter of the inside wall I la is.ab le toz readily slip: over the largest diameter at the"; outermost 'edgefof the cylindrical neck" l3. The'-outside.circumfer-" ential surface ofthe washerflpis-formedwith a" '30 beveled section-Mb, at substantially 'a 45 degree angle,. the bevel extending-downto abouti'halithe thickness'of saidiwasherllg v 1 I The manner in ,which'fthe washe'rf "is permanently assembled into zplace v in "the; preferred 5 embodiment of the invention and' the toolsfor H effecting such an assembly, the best-"shown in Fig.3- The J-bendtube 10: or'any ,other "tube to which the invention may be applied is first clampedbetween a pair of sp1itjaW's 'I5 nd 1E 40 which provide a. circular anvil; I 1 "at? the ilbperen'd against which the annular flange of'jth'e pipe-131' isadapted. to abut as a support: (The washe as e is then "disposed-uponf the'flangel; t2, the relative condition 'betwe'e'n'the opera g In orderto form'the washer- I! inwardly un-Q derneath: the angular jrecess way-previously men- 15 tioned, a vforming punch; gener'allyf indicated-by thelnumeral 'l8, is" provided, having'g'a centering hea'd l9- shaped toxconform-tothe inner taper of I th'e"fia're'd neck l3,"and adie ring IOP The'inner die forming surface 20aof the'ring 20 is made-at 5 6 an angle less than the angle of the beveled surface 14b of the initial cast washer l4, with respect to the axis, so that when the forming punch l8 descends to effect the assembly, the die ring 20 will force and compress the washer l4 radially inwardly against and underneath the flared cylindrical neck l3 in a. manner comparable to a swaging operation, and will simultaneously alter the outside contour ofth'e washer l4, in changing the angle of the initial bevel l4b to a less angle from the axis, and will incidentally produce a greater beveled surface area I40. (See'Figures 3 and 5A.) i

The above operation is furthermore conducive to changing somewhat thephysical characteristics or structure of the washer 14, in that the rej forming and compressive forces exerted bythe die ring 20 upon the washer l4'will'naturally produce a closer grained structure than whenthe sealing washer was originally cast.- It will thus be seenthat by so forming the washer', a higher grade sealing element is producedandheld in permanent assembly to the end of the-pipe, and

when-so-done at-thesource of manufacture, will thus require no further operation on the part of the tradesmen. I

While it is not absolutely; necessary; yetslfuit isdesired-to make further provision to moresecurely'anchor the washer; l4 ;in position, principally against rotation. about the cylindrical 1 neck J3,the'striking tool 18 maybe provided with one or more spaced cutter platesillrfourin this in- I stance, having relatively bluntprojecting shear: ing' prongs 2la at the lower inneraends, the relative position ofthe prongs Main the forming tool being such that they, (the prongs '2la). are adapted to strike-into about-half: the metal thickness in the extreme. upper annular edge. of the cylindrical neck-l3; shearing :lugs 22' outwardly which embed themselves into, the metal at the upper-part of the washerr-fl4 in .a manner best shown in Fig. 5 A. v H; o

The pipe Hytowhich the union is to be made with the Jrbend pipe; Ing is required to havean exteriorlythreaded bushing 23 secured thereto,

which may-be effected by asoldering operation. The inner surface of the bushing 23 is 4 formed withua beveledysurface 23a for sealing contact with a complementary. beveled surface.- l,4c of the washer l-4 The-pipe 10 isprovided with the usual form of interiorly threadedgcoupling nut 24, the

lower endbeing ,constructedv with an inturned' flange 25 for swivelly engagingthe lower surface of .the ,bead l2.v Thiscoupling nut 24, is adapted to threadedly engage the'bushing l2 for coaxiallydrawing; the two pipes Ill' and togetherrand eifectingi a'liquid tight seal. therebetween by the cooperation of the bushing 23 with thewasher I4.

.Another feature of this invention resides in the fact that'athg apglepf,the interior beveledjsurface 23a of thebi shing 2 3 is preferably made slightly greater than theuangleof the finished beveled surface l4cv, of the washer l4 so that when the:

bushing is drawn tightly against the washer I4, the beveled surface; 23a ofpthe bushing'first enagagesv against the uppermost part of the beveledwasher surface i4b, and-progressively descends downwardly in proportion to the amount of force that is exerted upon the coupling nut24 inmaking the union between thepipes I0. and I It Inithe modified-embodiment of therinvention, shown in Fig. 6, the construction ;is identical in all respectsto the first -form,,exc ept ,that there is no requirement for any. tools to complete the assembly of the. washer l4 underneath-the tubular flared end l3 of the pipe [0; this assembly, however, being effected at the time the pipes l0 and H are joined together upon the first installation. In this modifled construction the washer l4, as originally cast, is assembled around the and II, by screwing up on the nut 24, the bev- ;el ed surface-23a of the bushing 23 will force the,

washer "l4, inwardly 'into the recess I3a, and at the same time compressing the washer I4 inwardly and changing the contour of the bevel l4a 'tomore or less correspond with the bevel 23a of the bushing 23, thus effecting a liquid tight seal. One of the advantages of the present preferred embodiment is that an inherently structurally bettersealing-washer is provided byreason' of the assembly swaging operation, and an improved permanent connection is made between the wash.- er and the end of the tube, withthe minimum numberof operations. 1 1; 1

While T there I have been disclosed in this speciflcation' 'twoiorms, it; iS,;:to be understood that these forms are shown for the purpose of illustration only, and thatchanges may be made in the described structure without departing from the, spirit of the invention, the scope of which should be determined byireference to the followingclaims. V 1 1 v 1 What is claimedis: r Y a The herein described method of fabricating a sealingelement at the end of a pip-e'connection having a slightly flared terminal section and a circumferential flange removed from the end of said pipe, whichcomprises-initially forming-a soft metallicwasher with an insidedianietersuffi ciently large toclearthe maximum diameter of said flaredisectlon, assemblingsaid washenover said flared sectionto seat uponsaid flange, swaging said washerinwardly to reformits peripheral surface to adeslred contourand drift-the metal of said pipe adjacent the end being formed with a slight outwardly flared section, an integral outwardly formed flange positioned'pfrom the flared endof-said pipe,;and a metallic packing washer seated upon said flange and tightly embraced about'the outside-of said tapered portion said washer being held'ag-ainst relative rotation by means of one or more lugs formed downwardly andoi'itwardly from the annular end of 'saidflared section into an embedded'state in the'adjacent end of saidwasher. 3 f

3. "ma sealing joint construction fora coupling connect rrcomprisinig a, tubular pipe, a portion of saidpipe adjacentfthe end being: formed with a slight outwardly flared'section', anintegral outwardlyformed fl'ange positioned from the flared endo'f said pipe} and a".meta1li c packing washer seated upon said "flange arid: tightly embraced about the outside ,of said tapered perso Y said washerbeing held againstflrelative.rotation by means of one or, more-lugs sheared downwardly out of substantially one-half of the metal thick- 5 no.5; o

. 9,181,609 ness of said flared section into an embeddedstate" into the upper edge of said washer. v

4. In a sealing joint construction fora coupling connection comprising a tubular pipe, an integral outwardly formed flange on said pipe spaced from the end thereof, and a metallic packing washer seated upon said flange and tightly embraced;

about the outside of said tapered portion, said washer being held against movement by means of one or more lugs sheared downwardly out of'substantially one-half of the metal thickness of the outer end of said pipe beyond said flange into an embedded state into the upper edge of sai washer.

5. The method of forming a pipe jointelement" from a pipe having an outflaring endportion and an outstanding annular flange at the base of the flare which comprises placing a deformable metal washer on said flange, and permanently deformpipe, said deforming simultaneously shaping the outside of the washer with a long tapertoengage with a second element of the pipe joint and seal the joint. ;'r p i I ;6. As an article of manufacture an element for la'r flange at the base of the flare, and a deformable metal washer placedton said flange and permanently deformed'in a die-to cause the metal thereof to flowagainst said flange and the outside of thepipe, the outside of the washer being shaped long taper to engage with a second element. of the pipe joint and seal thejoint;

. ARTHUR HVGOEPEL.

PATRICK F. DONAHUE.

v forming a'pipe'joint comprising a pipe having an outflaring end portion and an outstanding annusimultaneously by said deforming to provide a 15 

